question

I take birth control and I don't exactly take it on time everyday but I take it around the same time everyday. me and my bf had unprotected sex and I doubled up on my birth control that day, and I'm really scared I may be pregnant. but I'm not sure if I'm just pmsing or if I'm supposed to be on my period but birth control stops it... but my boobs are tender and my stomach hurts and my stomach cramps on and off. what do y'all think???